Version 2.4.1.

[bison.git] / src / location.c

diff --git a/src/location.c b/src/location.c
index ecd3658b14cb42de74548343c004b878388fa1ac..57adf1882073fef954f01f14e554c9a4406f9f7c 100644 (file)
--- a/src/location.c
+++ b/src/location.c
@@ -1,38 +1,106 @@
 /* Locations for Bison
 /* Locations for Bison

-
-   Copyright (C) 2002, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2005, 2006, 2007 Free Software Foundation, Inc.

 
    This file is part of Bison, the GNU Compiler Compiler.
 
 
    This file is part of Bison, the GNU Compiler Compiler.
 

-   Bison is free software; you can redistribute it and/or modify
+   This program is free software: you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by
    it under the terms of the GNU General Public License as published by

-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.

 
 

-   Bison is distributed in the hope that it will be useful,
+   This program is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License

-   along with Bison; see the file COPYING.  If not, write to
-   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

 
 #include <config.h>
 #include "system.h"
 
 
 #include <config.h>
 #include "system.h"
 

+#include <mbswidth.h>

 #include <quotearg.h>
 
 #include <quotearg.h>
 

+#include "complain.h"

 #include "location.h"
 
 #include "location.h"
 

-location const empty_location;
+location const empty_location = EMPTY_LOCATION_INIT;
+
+/* If BUF is null, add BUFSIZE (which in this case must be less than
+   INT_MAX) to COLUMN; otherwise, add mbsnwidth (BUF, BUFSIZE, 0) to
+   COLUMN.  If an overflow occurs, or might occur but is undetectable,
+   return INT_MAX.  Assume COLUMN is nonnegative.  */
+
+static inline int
+add_column_width (int column, char const *buf, size_t bufsize)
+{
+  size_t width;
+  unsigned int remaining_columns = INT_MAX - column;
+
+  if (buf)
+    {
+      if (INT_MAX / 2 <= bufsize)
+       return INT_MAX;
+      width = mbsnwidth (buf, bufsize, 0);
+    }
+  else
+    width = bufsize;
+
+  return width <= remaining_columns ? column + width : INT_MAX;
+}
+
+/* Set *LOC and adjust scanner cursor to account for token TOKEN of
+   size SIZE.  */
+
+void
+location_compute (location *loc, boundary *cur, char const *token, size_t size)
+{
+  int line = cur->line;
+  int column = cur->column;
+  char const *p0 = token;
+  char const *p = token;
+  char const *lim = token + size;
+
+  loc->start = *cur;
+
+  for (p = token; p < lim; p++)
+    switch (*p)
+      {
+      case '\n':
+       line += line < INT_MAX;
+       column = 1;
+       p0 = p + 1;
+       break;
+
+      case '\t':
+       column = add_column_width (column, p0, p - p0);
+       column = add_column_width (column, NULL, 8 - ((column - 1) & 7));
+       p0 = p + 1;
+       break;
+
+      default:
+       break;
+      }
+
+  cur->line = line;
+  cur->column = column = add_column_width (column, p0, p - p0);
+
+  loc->end = *cur;
+
+  if (line == INT_MAX && loc->start.line != INT_MAX)
+    warn_at (*loc, _("line number overflow"));
+  if (column == INT_MAX && loc->start.column != INT_MAX)
+    warn_at (*loc, _("column number overflow"));
+}
+

 
 /* Output to OUT the location LOC.
    Warning: it uses quotearg's slot 3.  */
 void
 location_print (FILE *out, location loc)
 {
 
 /* Output to OUT the location LOC.
    Warning: it uses quotearg's slot 3.  */
 void
 location_print (FILE *out, location loc)
 {

+  int end_col = 0 < loc.end.column ? loc.end.column - 1 : 0;

   fprintf (out, "%s:%d.%d",
           quotearg_n_style (3, escape_quoting_style, loc.start.file),
           loc.start.line, loc.start.column);
   fprintf (out, "%s:%d.%d",
           quotearg_n_style (3, escape_quoting_style, loc.start.file),
           loc.start.line, loc.start.column);


@@ -40,9 +108,25 @@ location_print (FILE *out, location loc)
   if (loc.start.file != loc.end.file)
     fprintf (out, "-%s:%d.%d",
             quotearg_n_style (3, escape_quoting_style, loc.end.file),
   if (loc.start.file != loc.end.file)
     fprintf (out, "-%s:%d.%d",
             quotearg_n_style (3, escape_quoting_style, loc.end.file),

-            loc.end.line, loc.end.column - 1);
+            loc.end.line, end_col);

   else if (loc.start.line < loc.end.line)
   else if (loc.start.line < loc.end.line)

-    fprintf (out, "-%d.%d", loc.end.line, loc.end.column - 1);
-  else if (loc.start.column < loc.end.column - 1)
-    fprintf (out, "-%d", loc.end.column - 1);
+    fprintf (out, "-%d.%d", loc.end.line, end_col);
+  else if (loc.start.column < end_col)
+    fprintf (out, "-%d", end_col);
+}
+
+void
+boundary_set_from_string (boundary *bound, char *loc_str)
+{
+  /* Must search in reverse since the file name field may
+   * contain `.' or `:'.  */
+  char *delim = strrchr (loc_str, '.');
+  aver (delim);
+  *delim = '\0';
+  bound->column = atoi (delim+1);
+  delim = strrchr (loc_str, ':');
+  aver (delim);
+  *delim = '\0';
+  bound->line = atoi (delim+1);
+  bound->file = uniqstr_new (loc_str);

 }
 }